是否可以用PHP替换SQL函数？

Question

I have a very complex PHP function which would take a lot of time to rewrite in SQL. So I was wondering if it is possible in anyway to do something like that.

For example:

$query = "SELECT p.id FROM pages p WHERE check_access(p.id) = 1"
mysql_query($query);
...

check_access would be the PHP function.

Answer 1

It is not possible since, SQL interpretion is done separately from PHP interpretion.

You can only use the output of a php function inside an SQL query.